Dust-collector.



W. H. STEVENS.

` DUST COLLECTOR.

APPLICATION mio MAR. 14. 1916.

" 6 Patented July 1o, 19W.

2 SHEETS-SHEET I.

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w. H. STEVENS.

DUST COLLECTOR.

APPLICATION FILED MAR.14| ISIS.

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.LIIII wrLLIAM Harmon STEVENS, or nL'roona, PENNSYLVANIA'.

DUST-COLLECTOR fjnaaaees.

Specification of Letters Patent; Patent-,edil July Ml, lllli'nApplication led March 141, V1916. Serial No. 84,011. o

My invention re ates to improved means for collecting dust, carried insuspension by air or other' gas, and, inits preferredv form, itcomprises a conduit containing an expansion and collecting chamberprovided with baffles, ducts for delivering steam within the chamber,and ducts for delivering water within the chamber.

ln the operation of my invention, the air or gas laden with dust isblown ordrawn through said chamber, where it is expanded, baied, andmixed with steam, to effect deposition of the dust, and the water isdelivered within the chamber in the form of fine streams or sprays, tocondense the steam, wash down the deposited solid matter and wash theair, whichis thus purified when it escapes from the chamber. y

In the accompanying drawings, Figure 1 isa diagrammatic elevational viewof a dust collecting system embodying my improvements; Fig. 2 is anenlarged part sectional plan view of the collecting chamber with itsconnections; and Fig. 3 is an enlarged part sectional elevation ofcollecting chambers with connections therefor. y

The invention, in the form inwhich'it is embodied in the accompanyingdrawings, comprises one or morechambered cylinders or shells 1, formedof sheet metal, each bein provided with a closed top 1"L and with aconlcal bottom or hopper 1b having a discharge duct 2. Each shell issupported by brackets 3 fixed to thelower`l` part thereof and resting onpiers 4.l

Baiiies 5 are fixed Within each shell and inclined downwardly fromopposite parts thereof, alternating so that a zig-zag course is providedfor the dust'laden air or gas` which is baied thereby. The baflles arethus disposed so that waterfalling thereon will run down from one toanother in a zig-zag course, washing down deposits and crossing thecourse through which the gas must travel. f

A steam pipe 6 is provided with la section 6*- which extends around orpartially around an intermediate zone of each shell l and with sections6b which extend from the section 6EL through the shell and downwardlytherein, the 'sections 6b bein perforated and spaced within the shell sot at steam jets can be delivered therefrom and distributed thereby undercontrol of a valve 7 in the section 6u'.

A water pipe 8 is providedfw'ith sections 8a which extends lto the upperzones of thb respective shells l, with the laterally extending sections8b which are connected with the sections 8a through the shell, with theseetions 8c branching laterally from the sec? tions 8b, with thesections 8d whichexte'nd downwardly from the ends' of the'.sections 8,

andiwith the sections 8" which extend laterally from the bottoms of thesections 8d beneath the baflles 5. The sections 8b, 8", 8d,

land 8e are perforated and disposed within the shell so that water undercontrol of a v alve 9 in the section 8a can be sprayed and distributedinthe course of the air or gas and solid matter deposited can be washeddown through the shell.

An inlet duct 10 delivers the air or other gas containing dust or othersolid matter to be collected through the lower part of each shell 1 to`a part of its chamber below the lowermost balie 5; such gas or air beingbaied, expanded, mixed with steam and washed within the chamber throughthe functions of the parts 5, 6b, and 8b to' Se.

The purified air or gas escapes from each shell through a duct 11connected with the `top thereof and extending downward to an exhaustmanifold or box 12 having a hopper bottom 12a into which the pipes2discharge 1n the form illustrated. The box or passage 12 is providedwith the side openings 12b guarded by the upwardly inclined de-Aliectors or bailies 12, ythe airor gas escaping upwardly through theopenings. Any solid matter deposited within the box is washed downbyrain caught by the deflector 12C, and, in case of need,` water can bedelivered upon the deflectors to wash down solid matter, which isdischarged through the bottom '12a and the discharge duct 16 connectedtherewith.

The air or gas containing solid matter to be collected is, in thediagrammatic view shown in Fig. 1, drawn by a fan 13 from any placecontaining or thing delivering solid i matter in suspenslon, as a graincleaner, oat clipper, hard wood working milling machine, or the like;the fan delivering such air or gas laden with solid matter through theduct llto a usual collecting vessel l5,

l from the box 12, and the sum of the outwhich delivers the gas with theremaining suspended solid matter to the duct 10. i

It will be observed that the dust laden air passes through the fan 13,which forces it through the passage comprising the parts 14, 15, 10, 11,and l2, which increases pr gressively from the fan, the inlet to theduct being smaller than the outlet therefrom, the duct 11 being largerthan the outlet from the duct 10 and smaller than the outlets lets 12'Jof this "box being greater than th combined cross sections of the ducts11, whereby back pressure is prevented, the power required to drive thefan is reduced, better deposition of the dust in the chamber 1 issecured, and clogging of the-fan by moisture, as would take place if itwere used as a suction rather than as a pressure device, is avoided.

Having described my invention, I claim:

l. In mechanism of the character described, a baied passage, incombination with a box into the top of which said passage discharges,said box having a lateral aperture, a deflector adjacent to saidaperture, and a bottom outlet.

2. In mechanism of the character described, a plurality of baiiiedchambers, in combination with an exhaust chamber, ducts whereby the topsof said baied chambers are connected with-the top of said exhaustchamber, and bottom ducts by which the re- Spective chambers,l areadapted to discharge their solid and liquidv contents.

3. In mechanism of the character described, a conduit comprising achamber adapted for depositing and collecting'dust contained in airpassed therethrough, and

an exhaustl chamber having lateral Aapertures', deiectors adjacent tothe respective apertures and a bottom outlet, fon separat- .ing anddischarging dust and air vdelivered from said chamber first named.

4. In mechanism of the character described, a blower, an exhaustchamber, and

WILLIAM HATTON STEVENS.

